Pulp beater



bars.

' chine.

Patented Mar. 1, 1932 Urrs sr 'rss PATENT- OFFICE WILLIALE A. BESSMER, FPENNSYLVANIA, ASSIGNOR TO HAMMERMILL PAPER 00., OF ERIE, PENNSYLVANIA, ACORPORATION OF PENN SYLVANIA i PULP BEATER Aplication filed. September20, 1930; Serial 116483365.

This invention relates to paper manufacture and more particularly tobeating engines for acting upon-the pulp preliminarily to the passage ofthe latter to a paper ma- Pulp beaters or beating engines commonlycomprise a beater roll on a shaft which is supported at its ends onmembers, termed lighter bars, mounted on suitable frame work. The pulpis passed between the beater roll and a bed plate.

When a thick lap of pulp passes between the bed plate and the beaterroll the roll is raised, carrying its shaft out of the hearings on thelighter bars; and, upon the departure of the thick lap from beneath theroll the shaft of the roll drops down upon said bearings, subjecting thelighter bars to sudden jars and occasionally causing the latter tobreak. My invention provides simple and efficient means for relievingthe lighter bars of shocks and for effectively cushioning the movementsof said bars. A further feature of the invention resides in provisionfor positive adjustment of the positions of the lighter Other featuresof the invention will be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a view in side elevation illustrating an embodiment of myinvention.

Fig. 2 is a view in horizontal section on line 22 of Fig. 1.

Fig. 3 is a. vertical transverse sectional View on line 33 of Fig. 1.

Referring to the drawings, a conventional beater roll is indicateddiagrammatically at 5 and the associated bed plate at 6. As iscustomary, the beater roll is carried by and rotates with a shaft 7,which is journaled at opposite ends in hearings on the respectivelighter bars. In the drawings I have shown means associated with but oneend of the beater roll shaft 7 for supporting the latter but it will beunderstood that similar supporting means is provided for the oppositeend of said shaft, and since the supporting means at the respective endsof the shaft may be duplicates a disclosure of one thereof is sulficientfor an understanding of my invention.

The lighter bar 8, as shown, carries a hearing member 9 for thereception of the shaft is provided with a Also, the end portion of 7.Said lighter bar is pivotally mounted at one end onthe'supporting frame11. A convenient means for this purpose comprises a trunnion 12 on saidbar which trunnion is received in pocket 13 on said frame. The 0ppositeend of said lighter bar is provided with an opening 14 through whichthere extends a vertical adjusting rod 15, having a head 15 forengagement with the lower surface of said end of the bar. Said rod 15,as shown, threaded portion 16 for engagement with an interiorly threadedworm wheel 17 mounted between collars 18, 18 on an upward extension 19of the frame 11. Said worm wheel may be rotated, and the rod 15 and bar8 thereby adjusted through a worm'20on a shaft 21, which may be turnedthrough a suitable handle (not shown).

the lighter bar adjacent the rod 15 may rest upon a bolt 22 mounted inthe frame 11 and adjustable through nut 23. Any desired position of thelighter bar and parts carried thereby may be determined with precisionby adjustment of the bolt 22, while the movement of said bar and partsmay be effected through therod 15.

Bolted or otherwise secured to the housing orframe 11 directly below theshaft 7 and bearing member 9 is a stirrup 24. This stirrupsupports aspring plate 25 which in turn carries a spring 26. This spring, at itsupper end, cooperates with the lighter bar 8 through spring plate 27.When the beater roll is in normal operating position, the spring 26 isunder compression, the amount of compression being preferablysubstantially equal to the maximum upward movement of the roll fromnormal position. The amount of compression of the spring 26 may bevaried, as desired, by adjustment of the bolt 28 threaded into thebottom of the stirrup 24 and engaging the spring plate 25.

c When a thick lap of pulp passes between the bed plate 6 and heaterroll 5, said roll is raised and the spring 26 causes the lighter bar 8to follow the u ward movement of the roll 5 and shaft 7. fter the thickpiece of pulp has passed over the bed plate the spring 26 cushions thelighter bar 8, shaft 7, and roll 5 during their return to their lower ornormal position, and prevents the lighter bar from receiving suddenshocks 0r jars.

The terms and expressions which I have employed are used as terms ofdescription and not of limitation, and I have no intention, in the useof such terms and expressions, of excluding any equivalents of thefeatures shown and described or portions thereof, but recognize thatVarious modifications are possible Within. the scope of the inventionclaimed.

I claim; i

1. In combination, a frame, a lighter bar movably mounted on said frame,a beater roll supported by said bar, and a spring cooperating with saidbar intermediate the ends thereof.

2. In combination, a frame, a lighter bar pivotally connected at one endto said frame, means on said frame cooperating with the opposite end ofsaid bar for supporting the latter, bearing means on said lighter bar, abeater roll having a shaft supported on said bearing means, a springbearing at one end against an intermediate portion of said lighter bar,and means on saidframe for supporting the other end of said spring.

3. In combination, a frame, a lighter bar pivotally connected at one endto said frame, means on said frame cooperating with the opposite end ofsaid bar for supporting the latter, bearing means on said lighter bar, abeater roll having a shaft supported on said bearingmeans, and a springbearing at one end against. said'lighter bar directly below said bearingmeans for cushioning movements 7 of sald bar.

4. In combination, a frame, a lighter bar plvotally connected at one endto said frame, means on said frame cooperating wlth the opposite end ofsaid bar for supporting the latter, bearing means on said lighter bar, abeater roll having a shaft supported on said bearlng means as T1110bGElllIl at one end d. 7 D b against an lntermediate portion of saldlighter bar, and means depending from said frame for supporting theother end of said sprin In testimony'whereof, I have signed my name tothis specification this 15th dayof September, 1930. w 7

" WM. AQBESSMER.

